Initial K3 snapshot: 0.5B KDA/MLA/MoE train path

Standalone tree split from LLMRL/projects/kda. Includes Triton dt_bias backward fix, train_k3 --preset 0.5b, SFT, Docker runtime, and tests.
2026-08-25 14:43:17 +08:00
commit 584f7e9e73
140 changed files with 21592 additions and 0 deletions
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+"""Vendored FLA chunk KDA backward."""
+
+from kda._fla.ops.kda.chunk_bwd import chunk_kda_bwd
+
+__all__ = ["chunk_kda_bwd"]